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CVE-2016-20030— ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction

Quick assessment

Affected
ZKTeco Inc. ZKTeco ZKBioSecurity
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZKTeco ZKBioSecurity是中国ZKTeco公司的一个基于 Web 的一体式平台。 ZKTeco ZKBioSecurity 3.0版本存在安全漏洞，该漏洞源于用户枚举，可能导致未经验证攻击者通过提交部分字符发现有效用户名。

CVSS 9.8 · Critical EPSS 0.56% · P44

Possible ATT&CK Techniques 1 AI

T1087 · Account Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
ZKTeco Inc. ZKTeco ZKBioSecurity 3.0.1.0_R_230 affected
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I. Basic Information for CVE-2016-20030

Vulnerability Information
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Vulnerability Title
ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
Source: CVE Program / CVE List V5
Vulnerability Description
ZKTeco ZKBioSecurity 3.0 contains a user enumeration vulnerability that allows unauthenticated attackers to discover valid usernames by submitting partial characters via the username parameter. Attackers can send requests to the authLoginAction!login.do script with varying username inputs to enumerate valid user accounts based on application responses.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：在解析与净化处理之前进行授权
Source: CVE Program / CVE List V5
Vulnerability Title
ZKTeco ZKBioSecurity 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZKTeco ZKBioSecurity是中国ZKTeco公司的一个基于 Web 的一体式平台。 ZKTeco ZKBioSecurity 3.0版本存在安全漏洞，该漏洞源于用户枚举，可能导致未经验证攻击者通过提交部分字符发现有效用户名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
ZKTeco Inc. ZKTeco ZKBioSecurity 3.0.1.0_R_230 -

II. Public POCs for CVE-2016-20030

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III. Intelligence Information for CVE-2016-20030

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Vendor Advisories for CVE-2016-20030 (2)

Exploits & Public PoCs for CVE-2016-20030 (1)

Same Patch Batch · ZKTeco Inc. · 2026-03-15 · 9 CVEs total

CVE-2016-20026 9.8 CRITICAL ZKTeco ZKBioSecurity 3.0 Hardcoded Credentials Remote Code Execution
CVE-2016-20024 9.8 CRITICAL ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation
CVE-2016-20025 8.8 HIGH ZKTeco ZKAccess Professional 3.5.3 Privilege Escalation via Insecure Permissions
CVE-2016-20032 7.2 HIGH ZKTeco ZKAccess Security System 5.3.1 Stored XSS
CVE-2016-20029 6.2 MEDIUM ZKTeco ZKBioSecurity 3.0 File Path Manipulation Vulnerability
CVE-2016-20027 6.1 MEDIUM ZKTeco ZKBioSecurity 3.0 Multiple Reflected XSS Vulnerabilities
CVE-2016-20031 5.5 MEDIUM ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp
CVE-2016-20028 4.3 MEDIUM ZKTeco ZKBioSecurity 3.0 Cross-Site Request Forgery Superadmin

IV. Related Vulnerabilities

Same product: ZKTeco ZKBioSecurity
Same vendor: ZKTeco Inc.
Same weakness: CWE-551

V. Comments for CVE-2016-20030

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